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Hyperbolic angle function in the Lorentzian plane. (English) Zbl 1120.53305

By using definitions of oriented hyperbolic angles between non-null vectors, some theorems related to angles in a triangle in the Lorentzian plane are proved.

MSC:

53C50 Global differential geometry of Lorentz manifolds, manifolds with indefinite metrics
53D30 Symplectic structures of moduli spaces
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